# Can a tectonic plate subduct under one plate while another plate subducts under it along the same boundary?

At a triple junction plate boundary there are three tectonic plates meeting. We have plenty of examples of these boundaries on Earth, notably the Afar Triple Junction, Mendocino Triple Junction, and the extinct South Greenland Triple Junction. The majority of these junctions are divergent. But what if two of the three boundaries were convergent?

I am currently working on a fantasy world but thought this question was more appropriate for this SE. This is the triple junction I am asking about.

The arrows that go under the colored lines are where the subducting is. The salmon line is convergent and the mint line is divergent.

I was wondering if it was possible for a plate to both subduct another plate and also be subducted on basically the same boundary.

• I find your drawing a bit confusing as the right plate is moving two different directions? Jun 4, 2023 at 10:40
• @JeopardyTempest That was confusing, sorry. I also realized I had the wrong plates subducting. Jun 4, 2023 at 12:00